CN102723995B - A kind of active light module controller - Google Patents
A kind of active light module controller Download PDFInfo
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- CN102723995B CN102723995B CN201210238832.8A CN201210238832A CN102723995B CN 102723995 B CN102723995 B CN 102723995B CN 201210238832 A CN201210238832 A CN 201210238832A CN 102723995 B CN102723995 B CN 102723995B
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Abstract
The invention discloses a kind of active light module controller, comprise control unit, laser driving chip, laser diode unit and photodiode unit, control unit controls laser driving chip by serial data bus, serial data bus comprises bidirectional data line and clock line, control unit earth terminal and laser driving chip earth terminal ground connection respectively; Laser diode unit one end is electrically connected at the LD end of laser driving chip, and the laser diode unit other end is electrically connected at the MD end of laser driving chip; Photodiode unit one end is electrically connected at the PD end of laser driving chip, and the photodiode unit other end is electrically connected at DC power supply.The present invention adopts bidirectional data line and clock line two-wire system to be electrically connected between control unit and laser driving chip, therefore the space taken is very little, decrease circuit board space and chip pin quantity, reduce interconnected cost and signal disturbs mutually, improve resistance to overturning.
Description
Technical field
The present invention relates to technical field of optical fiber communication, especially relate to a kind of active light module controller.
Background technology
Along with development communication technologies, Intelligent optical fiber communication network is constantly popularized, the extensive application of fibre optic transmission equipment, and the core devices active light module operating rate of optical fiber communication equipment is more and more faster, and encapsulate more and more less, intelligence degree is more and more higher.Intelligent light module controller requires fault monitoring (Tx_Fault) in the working temperature to optical module, operating voltage, biased (Bias) electric current, utilizing emitted light power, received optical power and normal work, and the operating states such as dropout (LOS) are monitored in real time.
In order to realize monitoring and the diagnosis of optical module, usually adopt special chip, as the special chip DS1856/DS1859 of MAXIM company.Shown in Fig. 6, this kind of chip internal has the functional modules such as analog to digital converter, digital regulation resistance and logical circuit, and relate to the photoetching process of CMOS integrated technique, digital circuit device, producting process difficulty is large; This type chip pin is many, and encapsulation is large, is unfavorable for the miniaturization of optical module; And cost of manufacture is high, be unfavorable for the shortcoming such as to promote the use of of optical module.
Summary of the invention
The present invention be directed to the defect chip pin resource that provides one to save that above-mentioned background technology exists, reduce circuit board usable floor area, the risk that the small-signal reducing analog to digital converter or digital to analog converter disturbs mutually, improves the active light module controller of resistance to overturning.
For achieving the above object, the invention discloses a kind of active light module controller, it comprises control unit, laser driving chip, laser diode unit and photodiode unit, serial data bus is provided with between described control unit and described laser driving chip, described serial data bus comprises bidirectional data line and clock line, described control unit controls described laser driving chip by serial data bus, described control unit power input and described laser driving chip power input are electrically connected with DC power supply respectively, described control unit earth terminal and described laser driving chip earth terminal ground connection respectively, described laser diode unit one end is electrically connected at the LD end of described laser driving chip, and the described laser diode unit other end is electrically connected at the MD end of described laser driving chip, described photodiode unit one end is electrically connected at the PD end of described laser driving chip, and the photodiode unit other end is electrically connected at DC power supply.
Further, described laser diode unit comprises light-emitting diode and photo-detector diode, described light-emitting diode and photo-detector diode also connect, described DC power supply is electrically connected between described light-emitting diode and photo-detector diode, described Light-Emitting Diode one end is electrically connected at the LD end of described laser driving chip, and described modulation diode one end is electrically connected at the MD end of described laser driving chip.
Further, described control unit inside is provided with adjustable voltage temperature monitoring unit, can facilitates monitoring module supply voltage unit, can facilitates monitor optical module temperature unit and EEPROM (Electrically Erasable Programmable Read Only Memo), report when voltage, temperature exceed when control unit arranges tolerance limit, after monitoring variations in temperature, directly temperature-compensating is carried out to photodiode unit simultaneously.
Further, described photodiode unit comprises PIN diode, and described PIN diode one end is electrically connected at the PD end of described laser driving chip, and the PIN diode other end is electrically connected at DC power supply.
Further, described photodiode unit comprises DC/DC unit and avalanche photodide, described control unit is provided with pulse width modulation end, described DC/DC unit input and described pulse width modulation end are electrically connected, described DC/DC unit output and described avalanche photodide one end are electrically connected, and the described avalanche photodide other end is electrically connected at the PD end of described laser driving chip.
Further, described photodiode unit comprises digital regulation resistance, DC/DC unit and avalanche photodide, described digital regulation resistance input is electrically connected at described bidirectional data line and clock line respectively, described digital regulation resistance output and described DC/DC unit input are electrically connected, described DC/DC unit output and described avalanche photodide one end are electrically connected, and the described avalanche photodide other end is electrically connected at the PD end of described laser driving chip.
Further, described photodiode unit comprises digital to analog converter, DC/DC unit and avalanche photodide, described digital to analog converter input is electrically connected at described bidirectional data line and clock line respectively, described digital to analog converter output and described DC/DC unit input are electrically connected, described DC/DC unit output and described avalanche photodide one end are electrically connected, and the described avalanche photodide other end is electrically connected at the PD end of described laser driving chip.
Further, described photodiode unit comprises temperature conditioning unit, DC/DC unit and avalanche photodide, described temperature conditioning unit comprises thermistor, shunt resistance and divider resistance, described thermistor and shunt resistance are arranged in parallel, described thermistor one end is electrically connected with described DC/DC unit input and divider resistance one end respectively, the described divider resistance other end is electrically connected with described DC/DC unit output and described avalanche photodide one end respectively, and the described avalanche photodide other end is electrically connected at the PD end of described laser driving chip.
In sum, a kind of active light module controller of the present invention adopts bidirectional data line and clock line two-wire system to be electrically connected between control unit and laser driving chip, therefore the space taken is very little, decrease the space of circuit board and the quantity of chip pin, reduce interconnected cost, the risk that the small-signal simultaneously reducing analog to digital converter or digital to analog converter disturbs mutually, improves resistance to overturning.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present invention.
Fig. 2 is the structural representation of the another kind of embodiment of the present invention.
Fig. 3 is the structural representation of the third embodiment of the present invention.
Fig. 4 is the structural representation of the present invention's the 4th kind of embodiment.
Fig. 5 is the structural representation of the present invention's the 5th kind of embodiment.
Fig. 6 is the structural representation of prior art.
Embodiment
For feature of the present invention, technological means and the specific purposes reached, function can be understood further, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
As shown in Figures 1 to 5, a kind of active light module controller of the present invention comprises control unit 10, laser driving chip 20, laser diode unit 30 and photodiode unit 40, serial data bus 50 is provided with between described control unit 10 and described laser driving chip 20, described serial data bus 50 comprises bidirectional data line SDA and clock line SCL, described control unit 10 controls described laser driving chip 20 by serial data bus 50, described control unit 10 power input and described laser driving chip 20 power input are electrically connected with DC power supply VCC respectively, described control unit 10 earth terminal and described laser driving chip 20 earth terminal ground connection respectively.
Described control unit 10 inside is provided with adjustable voltage temperature monitoring unit, monitoring module supply voltage unit can be facilitated, monitor optical module temperature unit and EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM) can be facilitated, work as voltage, temperature exceedes when control unit 10 arranges tolerance limit and reports, directly temperature-compensating is carried out to photodiode unit 40 after monitoring variations in temperature simultaneously, ensure the consistency of photodiode unit 40 performance at different temperatures, EEPROM (Electrically Erasable Programmable Read Only Memo) can store manufacturer, interface type, product ID and other compensated informations various, simultaneously easily to control unit 10 collect various monitoring parameters store and report.
Described laser diode unit 30 comprises light-emitting diode 32 and photo-detector diode 31, described light-emitting diode 32 is with photo-detector diode 31 and connect, described DC power supply VCC is electrically connected between described light-emitting diode 32 and photo-detector diode 31, described Light-Emitting Diode 32 one end is electrically connected at the LD end of described laser driving chip 20, and described photo-detector diode 31 one end is electrically connected at the MD end of described laser driving chip 20.
Described photodiode unit 40 one end is electrically connected at the PD end of described laser driving chip 20, and photodiode unit 40 other end is electrically connected at DC power supply VCC.
Embodiment one
As shown in Figure 1, described photodiode unit 40 comprises PIN diode 401, and described PIN diode 401 one end is electrically connected at the PD end of described laser driving chip 20, and PIN diode 401 other end is electrically connected at DC power supply VCC.
Embodiment two
As shown in Figure 2, described photodiode unit 40 comprises DC/DC unit 402 and avalanche photodide 403, described control unit 10 is provided with pulse width modulation end, described DC/DC unit 402 input and described pulse width modulation end are electrically connected, described DC/DC unit 402 output and described avalanche photodide 403 one end are electrically connected, and described avalanche photodide 403 other end is electrically connected at the PD end of described laser driving chip 20; Described control unit 10 exports different pulse width modulation (PWM) signals as required, to change the output voltage of DC/DC unit 402, makes avalanche photodide 403 be operated in best operating point.
Embodiment three
As shown in Figure 3, described photodiode unit 40 comprises digital regulation resistance 403, DC/DC unit 404 and avalanche photodide 405, described digital regulation resistance 403 input is electrically connected at described bidirectional data line SDA and clock line SCL respectively, described digital regulation resistance 403 output and described DC/DC unit 404 input are electrically connected, described DC/DC unit 404 output and described avalanche photodide 405 one end are electrically connected, and described avalanche photodide 405 other end is electrically connected at the PD end of described laser driving chip 20; Described control unit 10 is by serial data bus 50 control figure potentiometer 403, to change the resistance value of digital regulation resistance 403, digital regulation resistance 403 is connected in series with described DC/DC unit 404, changing the output voltage of DC/DC unit 404 by changing digital regulation resistance 403 resistance, making avalanche photodide 405 be operated in best operating point.
Embodiment four
As shown in Figure 4, described photodiode unit 40 comprises digital to analog converter 406, DC/DC unit 407 and avalanche photodide 408, described digital to analog converter 406 input is electrically connected at described bidirectional data line SDA and clock line SCL respectively, described digital to analog converter 406 output and described DC/DC unit 407 input are electrically connected, described DC/DC unit 407 output and described avalanche photodide 408 one end are electrically connected, and described avalanche photodide 408 other end is electrically connected at the PD end of described laser driving chip 20; Described control unit 10, by serial data bus 50 domination number weighted-voltage D/A converter 406, to change the output of digital to analog converter 406, and then changes the output voltage of DC/DC unit 407, makes avalanche photodide 408 be operated in best operating point.
Embodiment five
As shown in Figure 5, described photodiode unit 40 comprises temperature conditioning unit 409, DC/DC unit 410 and avalanche photodide 411, described temperature conditioning unit 409 comprises thermistor RT, shunt resistance R1 and divider resistance R2, described thermistor RT and shunt resistance R1 is arranged in parallel, described thermistor RT one end is electrically connected with described DC/DC unit 410 input and divider resistance R2 one end respectively, the described divider resistance other end is electrically connected with described DC/DC unit 410 output and described avalanche photodide 411 one end respectively, described avalanche photodide 411 other end is electrically connected at the PD end of described laser driving chip 20, control unit 10, by measuring the reverse voltage of avalanche photodide 411, sets best avalanche photodide 411 bias voltage, and carries out temperature compensation by temperature conditioning unit 409, make avalanche photodide 411 be operated in best operating point.
When the present invention applies, serial data bus 50 often transmits the signal of, will produce a clock pulse; Wherein, position signal is divided into three kinds: start bit (START), position of rest (STOP) and data bit.Start bit: when clock line SCL transmits high level signal, bidirectional data line SDA transmits a saltus step from high to low, then create a start bit.Position of rest: when clock line SCL transmits high level signal, bidirectional data line SDA transmits a saltus step from low to high, then produce a position of rest.During transfer of data, data on bidirectional data line SDA line must keep stable in the high level period of clock pulse, control unit 10 should read the level signal on bidirectional data line SDA in during this period, and the high or low level state of the signal transmission of bidirectional data line SDA could can only change when clock line SCL signal transmission is low level.
Photodiode unit 40 of the present invention is by being electrically connected with bidirectional data line SDA and clock line SCL, digital signal is sent to control unit 10 by serial data bus 50, decrease intermediate link, improve measuring accuracy, simultaneously, the length of serial data bus 50 is 25 feet, and can organize control unit 10 and laser driving chip 20 with the peak transfer rate support of 10Kbps more; The number of pins that control unit 10 of the present invention reaches function number is 4 ~ 5, and control unit 10 can adopt 6 more small-sized pin or the encapsulation of 8 pin, and the pin had more can be used for other Function Extension, and decrease taking of board area, pin number also facilitates wiring less; Because eliminate the connection pin of analog to digital converter and digital to analog converter, also reduce the interference of high-frequency digital signal to analog to digital converter and digital to analog converter signal simultaneously.
In sum, a kind of active light module controller of the present invention adopts bidirectional data line SDA and clock line SCL two-wire system to be electrically connected between control unit 10 and laser driving chip 20, therefore the space taken is very little, decrease the space of circuit board and the quantity of chip pin, reduce interconnected cost, the risk that the small-signal simultaneously reducing analog to digital converter or digital to analog converter disturbs mutually, improves resistance to overturning.
The above embodiment only have expressed one embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as limitation of the scope of the invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with claims.
Claims (8)
1. an active light module controller, it is characterized in that: comprise control unit, laser driving chip, laser diode unit and photodiode unit, serial data bus is provided with between described control unit and described laser driving chip, described serial data bus comprises bidirectional data line and clock line, described control unit controls described laser driving chip by serial data bus, described control unit power input and described laser driving chip power input are electrically connected with DC power supply respectively, described control unit earth terminal and described laser driving chip earth terminal ground connection respectively, described laser diode unit one end is electrically connected at the LD end of described laser driving chip, and the described laser diode unit other end is electrically connected at the MD end of described laser driving chip, described photodiode unit one end is electrically connected at the PD end of described laser driving chip, and the photodiode unit other end is electrically connected at DC power supply.
2. a kind of active light module controller according to claim 1, it is characterized in that: described laser diode unit comprises light-emitting diode and photo-detector diode, described light-emitting diode and photo-detector diode also connect, described DC power supply is electrically connected between described light-emitting diode and photo-detector diode, described Light-Emitting Diode one end is electrically connected at the LD end of described laser driving chip, and described photo-detector diode one end is electrically connected at the MD end of described laser driving chip.
3. a kind of active light module controller according to claim 1, it is characterized in that: described control unit inside is provided with adjustable voltage temperature monitoring unit, can facilitates monitoring module supply voltage unit, can facilitates monitor optical module temperature unit and EEPROM (Electrically Erasable Programmable Read Only Memo), report when voltage, temperature exceed when control unit arranges tolerance limit, after monitoring variations in temperature, directly temperature-compensating is carried out to photodiode unit simultaneously.
4. a kind of active light module controller according to claim 1, it is characterized in that: described photodiode unit comprises PIN diode, described PIN diode one end is electrically connected at the PD end of described laser driving chip, and the PIN diode other end is electrically connected at DC power supply.
5. a kind of active light module controller according to claim 1, it is characterized in that: described photodiode unit comprises DC/DC unit and avalanche photodide, described control unit is provided with pulse width modulation end, described DC/DC unit input and described pulse width modulation end are electrically connected, described DC/DC unit output and described avalanche photodide one end are electrically connected, and the described avalanche photodide other end is electrically connected at the PD end of described laser driving chip.
6. a kind of active light module controller according to claim 1, it is characterized in that: described photodiode unit comprises digital regulation resistance, DC/DC unit and avalanche photodide, described digital regulation resistance input is electrically connected at described bidirectional data line and clock line respectively, described digital regulation resistance output and described DC/DC unit input are electrically connected, described DC/DC unit output and described avalanche photodide one end are electrically connected, and the described avalanche photodide other end is electrically connected at the PD end of described laser driving chip.
7. a kind of active light module controller according to claim 1, it is characterized in that: described photodiode unit comprises digital to analog converter, DC/DC unit and avalanche photodide, described digital to analog converter input is electrically connected at described bidirectional data line and clock line respectively, described digital to analog converter output and described DC/DC unit input are electrically connected, described DC/DC unit output and described avalanche photodide one end are electrically connected, and the described avalanche photodide other end is electrically connected at the PD end of described laser driving chip.
8. a kind of active light module controller according to claim 1, it is characterized in that: described photodiode unit comprises temperature conditioning unit, DC/DC unit and avalanche photodide, described temperature conditioning unit comprises thermistor, shunt resistance and divider resistance, described thermistor and shunt resistance are arranged in parallel, described thermistor one end is electrically connected with described DC/DC unit input and divider resistance one end respectively, the described divider resistance other end is electrically connected with described DC/DC unit output and described avalanche photodide one end respectively, the described avalanche photodide other end is electrically connected at the PD end of described laser driving chip.
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| CN102930877B (en) * | 2012-11-02 | 2015-04-15 | 东莞铭普光磁股份有限公司 | Digital monitoring system suitable for light module controller and implementation method of digital monitoring system |
| CN103903651B (en) * | 2012-12-25 | 2017-02-15 | 上海华虹宏力半导体制造有限公司 | Double-line serial port build-in self-test circuit, and communication method thereof |
| CN106055505B (en) * | 2016-05-20 | 2019-05-03 | 青岛海信宽带多媒体技术有限公司 | The transmission method of data in optical module and optical module |
| CN107515369A (en) * | 2017-08-17 | 2017-12-26 | 北京中电华大电子设计有限责任公司 | A kind of education and correction for juvenile offenders pin test circuit |
| CN110460381A (en) * | 2019-08-12 | 2019-11-15 | 青岛海信宽带多媒体技术有限公司 | A kind of optical module |
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| CN102509731A (en) * | 2011-12-28 | 2012-06-20 | 厦门市三安光电科技有限公司 | Alternating current vertical light emitting element and manufacture method thereof |
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| US8897329B2 (en) * | 2010-09-20 | 2014-11-25 | Corning Incorporated | Group III nitride-based green-laser diodes and waveguide structures thereof |
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| CN201243289Y (en) * | 2008-08-18 | 2009-05-20 | 青岛海信宽带多媒体技术股份有限公司 | Optical module based on processor control |
| CN102509731A (en) * | 2011-12-28 | 2012-06-20 | 厦门市三安光电科技有限公司 | Alternating current vertical light emitting element and manufacture method thereof |
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